Roman Ostvald

Br2F7− and Br3F10−: peculiar anions showing μ2- and μ3-bridging F-atoms

RbCl and CsCl react with BrF3 yielding the corresponding decafluoridotribromates(iii), MBr3F10 (M = Rb, Cs), which were structurally characterized for the first time. The Br3F10- anion is surprisingly not linear but contains a μ3-bridging fluorine atom and seems to be the first example of μ3-F bridging of Br atoms. The compounds are highly reactive and cannot be handled in glassware. As for the tetrafluoridobromates themselves, they are powerful oxidizers and thus suitable for the dry-chemical recycling of precious metals and additionally feature a significantly higher BrF3 content.

Halon 1301 synthesis by using fluoroxidants

This paper is devoted to the problems of application of alkali and alkaline-earth metal tetrafluorobromates in organic synthesis. The process of Halon 1301 synthesis, which is one of the best fire-extinguishing agents, is considered.

Synthesis of Highly Deactivated Polyhalogenated Aromatic Compounds

The barium fluorobromate(III) was obtained as the product of interaction between barium fluoride and bromine(III) trifluoride. The heat of formation of Ba(BrF4)2 was found by isothermal calorimetry method. By the TG/DT analysis the thermal stability of Ba(BrF4)2 was researched. It was found that this compound is mostly stable in the atmosphere or argon up to 250 °C. It was shown that bromine trifluoride and its derive compounds with alkali and alkali-earth metals fluorides can be applied like a highly-active brominating agent in case of production of various composite materials based on polyhalogenated aromatics.

Br 2 F 7 - and Br 3 F 10 -

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